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Hosts: Ed Brown, Penny Dumsday, Jo Benhamu. 00:00:40 An archaeological site in a Moroccan cave has long been known to have specimens of early humans. But an recent study has dated some of these bones to over 300,000 years old. If correct, that would make them the oldest fossilised remains of modern humans ever found - and it would change our understanding of the spread of humans out of Africa. For books to help explain evolution to young children, we recommend Grandmother Fish by Jonathan Tweet and Evolution: How We and All Living Things Came To Be by Daniel Loxton. 00:10:34 In the latest send-animals-to-space experiment, flatworms were studied on the International Space Station. And things got weird - especially with one worm that grew two heads! 00:15:42 Recently a lot of scientists have been suggesting that we're currently in the midst of a sixth mass extinction - and we humans are the prime cause of it. But Smithsonian paleontologist Doug Erwin argues that we're not there yet. T